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    Chi square Test of Independence

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    2. A state collects data on whether cell phone use while driving contributes to accidents. The 2 x 2 contingency table below is filled in. Complete the Chi Square test of independence by calculating the Chi Square test statistic.

    Accident Last Year No Accident Last Year Total
    Cell Phone in Use 30 (38.43) 350 (341.57) 380
    Cell Phone not in Use 60 (51.57) 450 (458.43) 510
    Total 90 800 890

    Numbers in parentheses are the expected frequencies. Numbers not in parentheses are the observed frequencies.

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    Solution Preview

    Please refer attached solution for complete details. Work done with the help of equation writer may not print here.

    Solution :

    Let Pc represent the fraction of accidents while using cell phones
    Pn represent the fraction of accidents while not using cell phones

    Ho: Pc=Pn ...

    Solution Summary

    Solution expains the steps to determine whether accidents are related to use of cell phone while driving.